Table 3.
The antimicrobial resistance genotypes, phenotypes and MIC values of colistin of mcr-1 and mcr-3 positive strains.
| Isolates | Species | Antibiotic resistant genes | Antimicrobial resistance phenotypesa | MIC values of colistin (μg/mL) |
|---|---|---|---|---|
| E22 | Escherichia coli | mcr-1 | CTX, CAZ, AMP, ATM | 16 |
| E23 | Escherichia coli | mcr-1 | CTX, CAZ | 16 |
| E24 | Escherichia coli | mcr-1 | CTX, CAZ | 16 |
| E25 | Escherichia coli | mcr-1 | CTX, CAZ, ATM | 16 |
| E26 | Escherichia coli | mcr-1 | CTX, CAZ, ATM, AK | 16 |
| E27 | Escherichia coli | mcr-1, sul2 | CRO, ATM, SXT | 16 |
| E28 | Escherichia coli | mcr-1 | CTX, CRO, CAZ, ATM, AK | 16 |
| E29 | Escherichia coli | mcr-1, blaCTX-M-9, fosA3, qnrS, floR, oqxAB, sul1, sul2, tetA, aac(6′)-Ib-cr | CTX, CRO, AMP, SXT, CIP | 16 |
| E30 | Escherichia coli | mcr-1, sul1, tetA | CRO, FOX, ATM, SXT, FOS, TE | 16 |
| E31 | Escherichia coli | mcr-1, floR, sul2, tetM | CTX, CRO, CAZ, SXT | 16 |
| E32 | Escherichia coli | mcr-1, floR, sul2, tetM | CTX, CRO, CAZ, SXT | 16 |
| E33 | Escherichia coli | mcr-1, floR, sul2, tetM | CTX, CRO, CAZ, SXT | 16 |
| E34 | Escherichia coli | mcr-1, blaTEM, blaCTX-M-9 | CTX, CRO, CAZ, AMP | 16 |
| E35 | Escherichia coli | mcr-1, blaTEM, blaCTX-M-9, floR, oqxAB, sul1, sul2, tetM, tetA, aac(6′)-Ib-cr, rmtB | CTX, CRO, FOX, AMP, ATM, SXT, TE, AK, CIP | 16 |
| E36 | Escherichia coli | mcr-1, blaTEM, blaCTX-M-9, fosA3, oqxAB, sul1, sul2 | CTX, CRO, AMP, ATM, SXT, FOS, CIP | 16 |
| E38 | Escherichia coli | mcr-1, tetM, tetA | CTX, CAZ, AMP, ATM, TE | 16 |
| E39 | Escherichia coli | mcr-1, qnrS, tetA | CTX, ATM, AMC, TE, FOS, CIP | 8 |
| E37 | Enterobacter cloacae | mcr-1, floR, sul2, rmtA, rmtB | CTX, FOX, AMP, AMC, SXT, AK, IPM | 16 |
| A4 | Aeromonas veronii | mcr-3, blaSHV, sul1 | CTX, IPM | 4 |
| A19 | Aeromonas hydrophila | mcr-3, blaTEM, blaCTX-M-9, qnrB, sul1, sul2, tetA | CTX, CRO, CAZ, AMP, ATM, AMC, FOS, TE, IPM | 16 |
| A48 | Aeromonas hydrophila | mcr-3, sul1, rmtA, rmtB | AMP, FOS | 8 |
| A49 | Aeromonas hydrophila | mcr-3, sul1, sul2, rmtA, rmtB | AMP, FOS, AK | 8 |
| A52 | Aeromonas hydrophila | mcr-3, qnrS, floR, sul1, tetA | AMP, FOS, TE CIP | 4 |
| A54 | Aeromonas veronii | mcr-3, sul1 | AMP, SXT, IPM, ETP | 4 |
aCTX, cefotaxime; CRO, ceftriaxone; CAZ, ceftazidime; FOX, cefoxitin; AMP, ampicillin; ATM, aztreonam; AMC: amoxicillin-clavulanic acid; SXT, trimethoprim-sulfamethoxazole; FOS, fosfomycin; TE, tetracycline; AK, amikacin; CIP, ciprofloxacin; IPM, imipenem; ETP, ertapenem.